Question

Put the verbs in brackets into the past perfect or the past perfect continuous . 13 .Mrs Edwards (make biscuits by the time her children came home. 14. Joh (try) to fix his computer for two hours before he decided to call a professional. 17.Liza was exhausted yesterday. She (study) for a history exam all day

Answer 1

13 .Mrs Edwards had made biscuits by the time her children came home.
14. Joh had been trying to fix his computer for two hours before he decided to call a professional. 
17.Liza was exhausted yesterday. She had been studying for a history exam all day

Answer 2

To put the verbs in brackets into the past perfect or the past perfect continuous tense, we need to consider the context and the time relationship between the actions.

13. Mrs. Edwards (make) biscuits by the time her children came home.

In this sentence, we need to use the past perfect tense to indicate an action that happened before another past action. The correct form would be: - Mrs. Edwards had made biscuits by the time her children came home.

14. John (try) to fix his computer for two hours before he decided to call a professional.

In this sentence, we can use either the past perfect or the past perfect continuous tense. Let's analyze both options:

- Past perfect tense: This tense is used to indicate an action that happened before another past action. The correct form would be: - John had tried to fix his computer for two hours before he decided to call a professional.

- Past perfect continuous tense: This tense is used to indicate the duration of an action that happened before another past action. The correct form would be: - John had been trying to fix his computer for two hours before he decided to call a professional.

Both options are grammatically correct, but the choice between the past perfect tense and the past perfect continuous tense depends on the emphasis you want to give to the duration of John's action. If you want to emphasize that he spent two hours on the action, you can use the past perfect continuous tense.

17. Liza was exhausted yesterday. She (study) for a history exam all day.

In this sentence, we need to use the past perfect continuous tense to show the duration of an action that happened before a past action. The correct form would be: - Liza was exhausted yesterday. She had been studying for a history exam all day.

In summary: - 13. Mrs. Edwards had made biscuits by the time her children came home. - 14. John had tried to fix his computer for two hours before he decided to call a professional. (or John had been trying...) - 17. Liza was exhausted yesterday. She had been studying for a history exam all day.